ASUS X79 DELUXE Motherboard
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Socket LGA2011 processors have a total of 40 PCI Express 3.0 lanes for video cards. This allows a very high-end configuration for the PCI Express x16 slots, but the exact configuration used will depend on the motherboard model.
The ASUS X79 DELUXE comes with four PCI Express 3.0 x16 slots. The first one always works at x16, with the fourth one working at x16 if the second one is unused and at x8 if it is in use; the second slot working at x8; and the third one always works at x4 speed. This means the board supports x16/x0/x4/x16 or x16/x8/x4/x8 configurations.
The motherboard supports 3-Way SLI arrays, and CrossFireX with up to four video cards.
When installing dual-slot video cards, you “kill” the slot immediately to the left (looking at the motherboard with its rear connectors facing up) of the slot being used. If you install a dual-slot video card in the second PCI Express x16 slot, you will be unable to use the third one.
There are also two PCI Express 2.0 x1 slots.
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